Antipollution fault.

After driving my new C3 for two weeks, it has been fine with no fault notices shown, but now, after changing one of the water hoses (which meant the battery was disconnected for quite a few hours), I keep getting the notification "Fault - antipollution". At the same time the orange antipollution warning light is on most of the time.
As it's a 2006 model, am I right in thinking that my car doesn't have a dpf or much in the way of sophisticated anti emissions equipment?
I haven't connected an OBD to my car, and I don't have Lexia, but would this notice be caused by an electrical anomaly, given that it didn't appear before the battery was disconnected?
Thanks for any help.

DanniAgro wrote:I haven't connected an OBD to my car

You should do this to save a lot of guessing and poking in the dark

Cheap enough OBD (like this from Amazon) can speed things up quickly.

DPF/FAP appears on some of the 1.6 HDi models.

I took your suggestion to heart and when I got home, connected up an OBD analyser to my C3.
It gave these results:

1. Turbo boost sensor A circuit high
2.
3. Turbo boost sensor A circuit high
4.
5.Mass or vol Air Flow A circuit intermittent
6. Intake air Temp Sensor1 circuit high

This result made me scratch my head, and so as I was passing my small local garage, popped in to talk to the owner. He told me that these sorts of results were common for Citroen, and that it was a minefield diagnosing this type of fault. However, he suggested that I should start by renewing the MAP sensor, a snip at £43 from Eurocarparts. (Click HERE) for the part at EuroCarParts after entering your reg.
Luckily, on starting the engine after the change, the antipollution fault warning and light went out, so the problem is solved, hopefully permanently.
Hopefully this might help someone in the same situation.

DanniAgro wrote:1. Turbo boost sensor A circuit high
2.
3. Turbo boost sensor A circuit high

Looks like MAP sensor problems, as you local garage suggested. The MAP is the Manifold Air pressure sensor and the turbo generates most of this pressure when its running.

This is the MAP sensor on Euro Car Parts (click here for the part)

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and having a cheap OBD scanner to hand (available on Amazon) gave you the codes to find the fault. Overall the cost is less than one diagnosis by a Citroen dealer. Great saving